Pneumatic Tire

Abstract

A pneumatic tire comprises a tread portion which is asymmetric about a tire equatorial plane. The tread portion comprises a first land portion on a vehicle outer side, and a second land portion on a vehicle inner side. The first land portion comprises a circumferential narrow groove extending in a circumferential direction, a plurality of first auxiliary grooves that pass through the circumferential narrow groove and are disposed at periodic intervals in the circumferential direction, first blocks defined by the plurality of first auxiliary grooves, and first narrow grooves that pass through the circumferential narrow groove and are disposed in the first blocks. The second land portion comprises a plurality of second auxiliary grooves disposed at periodic intervals in the circumferential direction, second blocks defined by the plurality of second auxiliary grooves, and second narrow grooves disposed in the second blocks.

Description

TECHNICAL FIELD[0001]The present technology relates to a pneumatic tire.BACKGROUND ART[0002]Pneumatic tires with a tread pattern designed to improve steering stability performance and noise performance are known. Also, pneumatic tires with a tread pattern designed to improve traction performance on snow and ice and suppress uneven wear are known.[0003]For example, the pneumatic tire described in Japanese Patent No. 4905599B is designed to improved steering stability performance and noise performance. The pneumatic tire includes a tread portion provided with at least four circumferential main grooves extending in the tire circumferential direction and a plurality of rib-like land portions defined by the circumferential main grooves. The pneumatic tire further includes an outer side second land portion provided with zigzag narrow grooves that extend in the tire circumferential direction with a zigzag shape and divide the outer side second land portion in the tire width direction, and ...

AI Technical Summary

Benefits of technology

[0007]The present technology provides a pneumatic tire with improved driving performance on dry road surfaces, wet road surfaces, and snow-covered road surfaces.

[0065]According to a pneumatic tire according to an embodiment of the present technology, performance on dry road surfaces, wet road surfaces, and snow-covered road surfaces can be improved.

Problems solved by technology

The pneumatic tire described in Japanese Patent No. 4905599B has improved steering stability performance and noise performance but driving performance on snow-covered road surfaces is insufficient due to not enough tire width directional grooves being provided in the tread surface.

The pneumatic tire described in Japanese Patent No. 5093880B includes lug grooves that communicate to a main groove at one end and terminate within the land portion at the other end, but driving performance on snow-covered road surfaces when traveling straight and cornering is not sufficient.

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